Projects Page 2012-2013

  1. Home
  2. Digital Citizenship
  3. experimental design page
  4. Personal Learning Network
  5. Resources
  6. Step 1 Brainstorming a Question
  7. Step 2 Variables and Hypotheses
  8. Step 3 Design Your Experiment
  9. Step 4 Plan your experiment
  10. Step 5 Do your experiment
  11. Step 6 Background
  12. Step 7 Analyze Your Data
  13. Step 8 What does it mean?
  14. Step 9 Prepare for Presentation
  15. Tutorials



Archives
Projects 2011-2012

Schools
Kennett Middle School
Josiah Bartlett School

Teachers
  1. For Teachers
  2. Project Overview
  3. rubrics

madw-tem3

Edit 0 14 …



external image images?q=tbn:ANd9GcSJNEQP2OVjGoy5xUXvFpRBh0_AtBWCuXZOT4UghkKnd-mGvfweexternal image images?q=tbn:ANd9GcTatPndNHbwyX8eHpDzwz5azinIC5-nB6JD3jRgwmaqlkcGGfLWjgexternal image images?q=tbn:ANd9GcS7xIbxTwAm8-oYdNev1xehg1Vdlbshq9ufRMZzwbABFlVZhjl0



http://t1.gstatic.com/images?q=tbn:ANd9GcSJNEQP2OVjGoy5xUXvFpRBh0_AtBWCuXZOT4UghkKnd-mGvfwe
http://t2.gstatic.com/images?q=tbn:ANd9GcS7xIbxTwAm8-oYdNev1xehg1Vdlbshq9ufRMZzwbABFlVZhjl0
http://t3.gstatic.com/images?q=tbn:ANd9GcTatPndNHbwyX8eHpDzwz5azinIC5-nB6JD3jRgwmaqlkcGGfLWjg


Soaking Fruit


http://t1.gstatic.com/images?q=tbn:ANd9GcSJNEQP2OVjGoy5xUXvFpRBh0_AtBWCuXZOT4UghkKnd-mGvfwe

Broad Question:

What substance has the greatest impact on the structure of fruit skin?

Specific Question:

Does water, rubbing alcohol, and hydrogen peroxide break down a banana, orange, or peach peel fastest?

Variablesb

Independent Variable:

Liquids

Dependent Variable:

Break down amount in grams

Variables That Need To Be Controlled:

The same amount of liquid, The same time drying, The same unit of measuring, Same temperature in room, Same time in the liquids

Hypothesis:

I hypothesize hydrogen peroxide will have the biggest effect followed by rubbing alcohol and lastly water.


Graph of Hypothesis:

Science_Fair_Graph_2012.JPG

Experimental Design

I will conduct my experiment at my house because that is where I can have my experiment going for as long as I need. I will be the only person in my experiment. I will be conducting my experiment, recording data, and taking pictures. I am doing nine trials of each fruit and three of each liquid for each fruit, making a total of twenty seven trials. I will be printing out the spreed sheet to record data. I will be taking pictures of the cups, every five days. Then I will download the pictures to the computer.


Materials List

  • 3 Oranges
  • 3 Bananas
  • 3 Peaches
  • 1 Peeler
  • 1 Triple beam balance
  • 27 Clear Plastic cups
  • 1 Measuring cup
  • Rubbing Alcohol
  • Water
  • Paper Towels
  • Hydrogen Peroxide

Detailed Procedure

  1. Fill Nine cups full with 6oz.of water
  2. Fill Nine cups full with 6oz.of Hydrogen Peroxide
  3. Fill Nine cups full with 6oz. of Peroxide
  4. Peel the Fruit
  5. Put a piece of the banana skin in three cups of water
  6. Do step 5 again, but instead of water put it in hydrogen peroxide
  7. Do step 6 again, but instead of water put it in rubbing alcohol
  8. Do steps 5-7 again, but with peach skin
  9. Do step 5-7 again, but with orange skin
  10. Take picture every five days
  11. Leave skin in liquids for thirty one days
  12. Take skin out of liquids and let dry on paper towels for one hour
  13. Record masses

Background Research


  • Acids have a sour take but before you can taste some they can poison you
  • When acids react they produce Hydrogen Gas
  • Acid-substance that releases hydrogen ions
  • Corrosive- Able to destroy something by chemical action

  • Rubbing Alcohol is related to ethanol and drinking Alcohol
  • Rubbing Alcohol is extremely drying
  • Rubbing Alcohol kills bacteria and other fungi
  • If contact with eyes or lungs it can be very irritating and if ingested it could be faitel to your health

  • In a garbage can orange peels takes 6 months
  • Banana takes 2 to 5 weeks
  • Before decomposition they can release harmful gases
  • Can release Methane if not disposed of properly
  • Acid in fruit can release a dangerous amount of zinc while being contained
  • Sugar can be used in the process of preserving fruit
  • Fruit can also be preserved in water or syrups while being froze

References




Results

Data Table


Graphs

Science_Fair_2012_Final_Graph.JPG

Photos

Madison_2.jpgMadison_1.jpgMadison_3.jpgMadison_4.jpgMadison_5.jpgMadison_6.jpg

Data Analysis


Conclusion

The original purpose of this experiment was to see which liquid, out of water, rubbing alcohol, and hydrogen peroxide would have a greater effect on the structure of peach, banana, and orange skin.The results show that rubbing alcohol had the greatest effect on the fruit skins. Rubbing alcohol ranged from losing 1.9 oz. to 6.3oz for the fruit skin. Next was hydrogen peroxide which ranged from orange skin gaining .9 oz. to peach skin losing 2.5 oz. Last was water. Water ranged from banana skin gaining 1.9 oz. to peach skin losing 2.8 oz. The final average for peach skin was rubbing alcohol 5.7 oz., water 1.67 oz., and hydrogen peroxide 2.1 oz. Next banana peel had an average of rubbing alcohol 5.1 oz lost, water 1.2 oz. gained, and lastly hydrogen peroxide with a average weight loss of .5 oz. Finally, orange peels were rubbing alcohol lost 2.23 oz., water lost 1.47 oz., and hydrogen peroxide being the second peel to have an gained weight average was .47 oz.

Discussion

My hypothesis was that hydrogen peroxide would have the greatest effect followed by rubbing alcohol, then lastly water. My results do not support my hypothesis. A trend shown throughout the experiment was that the rubbing alcohol was evaporating quickly. By day five the water was noticeably getting lower in the cup. At day fifteen it looked like there was half as much rubbing alcohol left in the containers than when the peels were first put in the container. Hydrogen peroxide also evaporated, but not as much as the rubbing alcohol. Water seemed to have not evaporated at all. The independent variable (liquids) and the dependent variable (fruit skins) does have a relation because rubbing alcohol had a drying effect on the fruit skins and water had the least drying effect.
I think my test went very well. I had not problems throughout the experiment. Everything went as I had it written down in my procedure. If I could improve my experiment, I would like to use liquids that can have a more damaging effect to the fruit skins. I would also like to have more fruit skins in the experiment. An interesting future study would be to to use the actual fruits. In the past I have done the drying effect a dehydrator has on citrus and non-citrus fruit so now I could use liquids for that procedure because I have knowledge of the effect on the skins.